/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-34.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 06:19:54,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 06:19:54,196 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 06:19:54,199 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 06:19:54,199 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 06:19:54,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 06:19:54,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 06:19:54,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 06:19:54,213 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 06:19:54,216 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 06:19:54,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 06:19:54,217 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 06:19:54,217 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 06:19:54,218 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 06:19:54,218 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 06:19:54,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 06:19:54,219 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 06:19:54,219 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 06:19:54,220 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 06:19:54,220 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 06:19:54,220 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 06:19:54,220 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 06:19:54,221 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 06:19:54,221 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 06:19:54,221 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 06:19:54,221 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 06:19:54,221 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 06:19:54,221 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 06:19:54,222 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 06:19:54,222 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 06:19:54,223 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 06:19:54,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 06:19:54,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 06:19:54,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 06:19:54,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 06:19:54,223 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 06:19:54,224 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 06:19:54,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 06:19:54,224 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 06:19:54,224 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 06:19:54,224 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 06:19:54,224 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 06:19:54,225 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 06:19:54,225 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 06:19:54,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 06:19:54,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 06:19:54,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 06:19:54,433 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 06:19:54,436 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 06:19:54,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-34.i [2023-12-19 06:19:55,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 06:19:55,636 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 06:19:55,636 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-34.i [2023-12-19 06:19:55,643 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c699514a/4dd508931a804deeb67e6967c3a912a7/FLAGae3b11279 [2023-12-19 06:19:55,653 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c699514a/4dd508931a804deeb67e6967c3a912a7 [2023-12-19 06:19:55,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 06:19:55,656 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 06:19:55,656 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 06:19:55,656 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 06:19:55,662 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 06:19:55,663 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:55,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3123d92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55, skipping insertion in model container [2023-12-19 06:19:55,664 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:55,684 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 06:19:55,800 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-34.i[916,929] [2023-12-19 06:19:55,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 06:19:55,900 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 06:19:55,914 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-34.i[916,929] [2023-12-19 06:19:55,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 06:19:55,981 INFO L206 MainTranslator]: Completed translation [2023-12-19 06:19:55,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55 WrapperNode [2023-12-19 06:19:55,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 06:19:55,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 06:19:55,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 06:19:55,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 06:19:55,990 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,051 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 318 [2023-12-19 06:19:56,051 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 06:19:56,052 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 06:19:56,052 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 06:19:56,052 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 06:19:56,060 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,064 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,078 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 06:19:56,078 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,109 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 06:19:56,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 06:19:56,109 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 06:19:56,110 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 06:19:56,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (1/1) ... [2023-12-19 06:19:56,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 06:19:56,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:19:56,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 06:19:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 06:19:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 06:19:56,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 06:19:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 06:19:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 06:19:56,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 06:19:56,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 06:19:56,353 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 06:19:56,356 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 06:19:56,840 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 06:19:56,873 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 06:19:56,873 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 06:19:56,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:19:56 BoogieIcfgContainer [2023-12-19 06:19:56,874 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 06:19:56,876 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 06:19:56,876 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 06:19:56,878 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 06:19:56,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 06:19:55" (1/3) ... [2023-12-19 06:19:56,879 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770e5a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:19:56, skipping insertion in model container [2023-12-19 06:19:56,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 06:19:55" (2/3) ... [2023-12-19 06:19:56,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770e5a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 06:19:56, skipping insertion in model container [2023-12-19 06:19:56,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 06:19:56" (3/3) ... [2023-12-19 06:19:56,881 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-100_file-34.i [2023-12-19 06:19:56,893 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 06:19:56,893 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 06:19:56,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 06:19:56,944 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@37838115, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 06:19:56,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 06:19:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 80 states have (on average 1.5375) internal successors, (123), 81 states have internal predecessors, (123), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-19 06:19:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-12-19 06:19:56,976 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:19:56,977 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:19:56,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:19:56,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:19:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash 231336762, now seen corresponding path program 1 times [2023-12-19 06:19:56,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:19:56,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539328467] [2023-12-19 06:19:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:19:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:19:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:19:57,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:19:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539328467] [2023-12-19 06:19:57,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 06:19:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625485763] [2023-12-19 06:19:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:19:57,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:19:57,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:19:57,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:19:57,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 06:19:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:19:57,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 06:19:57,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:19:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2023-12-19 06:19:57,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:19:57,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625485763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:19:57,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:19:57,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 06:19:57,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883461023] [2023-12-19 06:19:57,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:19:57,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 06:19:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:19:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 06:19:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 06:19:57,502 INFO L87 Difference]: Start difference. First operand has 127 states, 80 states have (on average 1.5375) internal successors, (123), 81 states have internal predecessors, (123), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) [2023-12-19 06:19:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:19:57,538 INFO L93 Difference]: Finished difference Result 251 states and 464 transitions. [2023-12-19 06:19:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 06:19:57,540 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) Word has length 272 [2023-12-19 06:19:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:19:57,546 INFO L225 Difference]: With dead ends: 251 [2023-12-19 06:19:57,546 INFO L226 Difference]: Without dead ends: 125 [2023-12-19 06:19:57,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 06:19:57,551 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 06:19:57,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 06:19:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-19 06:19:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-12-19 06:19:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.4936708860759493) internal successors, (118), 79 states have internal predecessors, (118), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-19 06:19:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 206 transitions. [2023-12-19 06:19:57,600 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 206 transitions. Word has length 272 [2023-12-19 06:19:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:19:57,601 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 206 transitions. [2023-12-19 06:19:57,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) [2023-12-19 06:19:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 206 transitions. [2023-12-19 06:19:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-12-19 06:19:57,608 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:19:57,608 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:19:57,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 06:19:57,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 06:19:57,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:19:57,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:19:57,822 INFO L85 PathProgramCache]: Analyzing trace with hash -239992894, now seen corresponding path program 1 times [2023-12-19 06:19:57,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:19:57,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647012251] [2023-12-19 06:19:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:19:57,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:19:57,891 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:19:57,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792633969] [2023-12-19 06:19:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:19:57,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:19:57,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:19:57,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:19:57,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 06:19:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:19:58,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 06:19:58,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:19:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:19:58,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:19:58,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:19:58,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647012251] [2023-12-19 06:19:58,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:19:58,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792633969] [2023-12-19 06:19:58,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792633969] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:19:58,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:19:58,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 06:19:58,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188989825] [2023-12-19 06:19:58,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:19:58,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 06:19:58,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:19:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 06:19:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 06:19:58,401 INFO L87 Difference]: Start difference. First operand 125 states and 206 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:19:58,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:19:58,761 INFO L93 Difference]: Finished difference Result 374 states and 615 transitions. [2023-12-19 06:19:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 06:19:58,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 272 [2023-12-19 06:19:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:19:58,770 INFO L225 Difference]: With dead ends: 374 [2023-12-19 06:19:58,770 INFO L226 Difference]: Without dead ends: 250 [2023-12-19 06:19:58,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 06:19:58,776 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 192 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 06:19:58,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 766 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 06:19:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-12-19 06:19:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 127. [2023-12-19 06:19:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 81 states have internal predecessors, (120), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-19 06:19:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 208 transitions. [2023-12-19 06:19:58,813 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 208 transitions. Word has length 272 [2023-12-19 06:19:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:19:58,815 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 208 transitions. [2023-12-19 06:19:58,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:19:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 208 transitions. [2023-12-19 06:19:58,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-12-19 06:19:58,834 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:19:58,834 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:19:58,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 06:19:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-19 06:19:59,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:19:59,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:19:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash 597301288, now seen corresponding path program 1 times [2023-12-19 06:19:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:19:59,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791261136] [2023-12-19 06:19:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:19:59,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:19:59,112 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:19:59,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574880953] [2023-12-19 06:19:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:19:59,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:19:59,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:19:59,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:19:59,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 06:19:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:19:59,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 06:19:59,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:19:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:19:59,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:19:59,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:19:59,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791261136] [2023-12-19 06:19:59,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:19:59,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574880953] [2023-12-19 06:19:59,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574880953] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:19:59,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:19:59,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 06:19:59,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655140212] [2023-12-19 06:19:59,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:19:59,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 06:19:59,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:19:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 06:19:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 06:19:59,527 INFO L87 Difference]: Start difference. First operand 127 states and 208 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:19:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:19:59,658 INFO L93 Difference]: Finished difference Result 408 states and 666 transitions. [2023-12-19 06:19:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 06:19:59,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 273 [2023-12-19 06:19:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:19:59,661 INFO L225 Difference]: With dead ends: 408 [2023-12-19 06:19:59,661 INFO L226 Difference]: Without dead ends: 282 [2023-12-19 06:19:59,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 06:19:59,662 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 188 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 06:19:59,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 634 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 06:19:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-12-19 06:19:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 253. [2023-12-19 06:19:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 162 states have (on average 1.4753086419753085) internal successors, (239), 162 states have internal predecessors, (239), 88 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-19 06:19:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 415 transitions. [2023-12-19 06:19:59,688 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 415 transitions. Word has length 273 [2023-12-19 06:19:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:19:59,688 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 415 transitions. [2023-12-19 06:19:59,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:19:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 415 transitions. [2023-12-19 06:19:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:19:59,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:19:59,691 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:19:59,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 06:19:59,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:19:59,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:19:59,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:19:59,899 INFO L85 PathProgramCache]: Analyzing trace with hash -166328102, now seen corresponding path program 1 times [2023-12-19 06:19:59,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:19:59,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601764354] [2023-12-19 06:19:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:19:59,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:19:59,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:19:59,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843757058] [2023-12-19 06:19:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:19:59,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:19:59,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:19:59,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:19:59,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 06:20:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:20:00,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-19 06:20:00,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:20:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1933 proven. 66 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2023-12-19 06:20:00,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 06:20:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:20:00,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:20:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601764354] [2023-12-19 06:20:00,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:20:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843757058] [2023-12-19 06:20:00,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843757058] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 06:20:00,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 06:20:00,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-12-19 06:20:00,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301813071] [2023-12-19 06:20:00,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:20:00,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 06:20:00,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:20:00,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 06:20:00,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-19 06:20:00,721 INFO L87 Difference]: Start difference. First operand 253 states and 415 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:20:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:20:01,004 INFO L93 Difference]: Finished difference Result 999 states and 1629 transitions. [2023-12-19 06:20:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 06:20:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 274 [2023-12-19 06:20:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:20:01,008 INFO L225 Difference]: With dead ends: 999 [2023-12-19 06:20:01,008 INFO L226 Difference]: Without dead ends: 747 [2023-12-19 06:20:01,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-19 06:20:01,010 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 463 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 06:20:01,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 643 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 06:20:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2023-12-19 06:20:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 581. [2023-12-19 06:20:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 418 states have (on average 1.5239234449760766) internal successors, (637), 422 states have internal predecessors, (637), 156 states have call successors, (156), 6 states have call predecessors, (156), 6 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2023-12-19 06:20:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 949 transitions. [2023-12-19 06:20:01,059 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 949 transitions. Word has length 274 [2023-12-19 06:20:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:20:01,060 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 949 transitions. [2023-12-19 06:20:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:20:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 949 transitions. [2023-12-19 06:20:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:20:01,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:20:01,062 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:20:01,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 06:20:01,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:20:01,270 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:20:01,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:20:01,271 INFO L85 PathProgramCache]: Analyzing trace with hash -25779492, now seen corresponding path program 1 times [2023-12-19 06:20:01,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:20:01,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036203588] [2023-12-19 06:20:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:20:01,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:20:01,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:20:01,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480168111] [2023-12-19 06:20:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:20:01,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:20:01,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:20:01,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:20:01,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 06:20:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:20:01,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 06:20:01,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:20:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1933 proven. 66 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2023-12-19 06:20:02,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 06:20:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:20:02,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:20:02,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036203588] [2023-12-19 06:20:02,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:20:02,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480168111] [2023-12-19 06:20:02,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480168111] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 06:20:02,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 06:20:02,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-12-19 06:20:02,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44459020] [2023-12-19 06:20:02,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:20:02,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 06:20:02,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:20:02,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 06:20:02,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-19 06:20:02,159 INFO L87 Difference]: Start difference. First operand 581 states and 949 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:20:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:20:02,343 INFO L93 Difference]: Finished difference Result 1163 states and 1899 transitions. [2023-12-19 06:20:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 06:20:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 274 [2023-12-19 06:20:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:20:02,353 INFO L225 Difference]: With dead ends: 1163 [2023-12-19 06:20:02,353 INFO L226 Difference]: Without dead ends: 583 [2023-12-19 06:20:02,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-19 06:20:02,356 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 259 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 06:20:02,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 525 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 06:20:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-12-19 06:20:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 421. [2023-12-19 06:20:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 296 states have (on average 1.527027027027027) internal successors, (452), 298 states have internal predecessors, (452), 120 states have call successors, (120), 4 states have call predecessors, (120), 4 states have return successors, (120), 118 states have call predecessors, (120), 120 states have call successors, (120) [2023-12-19 06:20:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 692 transitions. [2023-12-19 06:20:02,414 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 692 transitions. Word has length 274 [2023-12-19 06:20:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:20:02,414 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 692 transitions. [2023-12-19 06:20:02,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:20:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 692 transitions. [2023-12-19 06:20:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:20:02,417 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:20:02,417 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:20:02,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 06:20:02,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:20:02,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:20:02,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:20:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash -228367716, now seen corresponding path program 1 times [2023-12-19 06:20:02,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:20:02,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939292176] [2023-12-19 06:20:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:20:02,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:20:02,645 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:20:02,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842826497] [2023-12-19 06:20:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:20:02,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:20:02,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:20:02,646 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:20:02,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 06:20:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:20:02,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-19 06:20:02,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:20:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1050 proven. 324 refuted. 0 times theorem prover too weak. 2410 trivial. 0 not checked. [2023-12-19 06:20:07,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 06:20:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:20:13,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:20:13,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939292176] [2023-12-19 06:20:13,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:20:13,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842826497] [2023-12-19 06:20:13,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842826497] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 06:20:13,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 06:20:13,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [21] total 28 [2023-12-19 06:20:13,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972284743] [2023-12-19 06:20:13,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:20:13,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 06:20:13,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:20:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 06:20:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2023-12-19 06:20:13,711 INFO L87 Difference]: Start difference. First operand 421 states and 692 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:20:24,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-12-19 06:20:28,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-12-19 06:20:32,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-12-19 06:20:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:20:43,383 INFO L93 Difference]: Finished difference Result 1079 states and 1731 transitions. [2023-12-19 06:20:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 06:20:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 274 [2023-12-19 06:20:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:20:43,389 INFO L225 Difference]: With dead ends: 1079 [2023-12-19 06:20:43,389 INFO L226 Difference]: Without dead ends: 659 [2023-12-19 06:20:43,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2023-12-19 06:20:43,392 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 295 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-12-19 06:20:43,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1072 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 268 Invalid, 3 Unknown, 0 Unchecked, 21.3s Time] [2023-12-19 06:20:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2023-12-19 06:20:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 496. [2023-12-19 06:20:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 362 states have (on average 1.4972375690607735) internal successors, (542), 365 states have internal predecessors, (542), 125 states have call successors, (125), 8 states have call predecessors, (125), 8 states have return successors, (125), 122 states have call predecessors, (125), 125 states have call successors, (125) [2023-12-19 06:20:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 792 transitions. [2023-12-19 06:20:43,439 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 792 transitions. Word has length 274 [2023-12-19 06:20:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:20:43,439 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 792 transitions. [2023-12-19 06:20:43,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:20:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 792 transitions. [2023-12-19 06:20:43,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:20:43,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:20:43,443 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:20:43,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 06:20:43,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:20:43,650 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:20:43,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:20:43,650 INFO L85 PathProgramCache]: Analyzing trace with hash -171109414, now seen corresponding path program 1 times [2023-12-19 06:20:43,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:20:43,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320688879] [2023-12-19 06:20:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:20:43,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:20:43,679 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:20:43,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578637892] [2023-12-19 06:20:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:20:43,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:20:43,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:20:43,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:20:43,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 06:20:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:20:43,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 06:20:43,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:20:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:20:48,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:20:48,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:20:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320688879] [2023-12-19 06:20:48,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:20:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578637892] [2023-12-19 06:20:48,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578637892] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:20:48,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:20:48,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:20:48,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311971887] [2023-12-19 06:20:48,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:20:48,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:20:48,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:20:48,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:20:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:20:48,943 INFO L87 Difference]: Start difference. First operand 496 states and 792 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:20:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:20:58,707 INFO L93 Difference]: Finished difference Result 1532 states and 2438 transitions. [2023-12-19 06:20:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 06:20:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 274 [2023-12-19 06:20:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:20:58,713 INFO L225 Difference]: With dead ends: 1532 [2023-12-19 06:20:58,713 INFO L226 Difference]: Without dead ends: 1289 [2023-12-19 06:20:58,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-12-19 06:20:58,715 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 510 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-19 06:20:58,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1946 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-12-19 06:20:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2023-12-19 06:20:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1191. [2023-12-19 06:20:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 865 states have (on average 1.484393063583815) internal successors, (1284), 871 states have internal predecessors, (1284), 305 states have call successors, (305), 20 states have call predecessors, (305), 20 states have return successors, (305), 299 states have call predecessors, (305), 305 states have call successors, (305) [2023-12-19 06:20:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1894 transitions. [2023-12-19 06:20:58,845 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1894 transitions. Word has length 274 [2023-12-19 06:20:58,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:20:58,846 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1894 transitions. [2023-12-19 06:20:58,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:20:58,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1894 transitions. [2023-12-19 06:20:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:20:58,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:20:58,849 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:20:58,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 06:20:59,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:20:59,057 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:20:59,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:20:59,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1037714342, now seen corresponding path program 1 times [2023-12-19 06:20:59,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:20:59,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712000258] [2023-12-19 06:20:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:20:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:20:59,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:20:59,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284102440] [2023-12-19 06:20:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:20:59,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:20:59,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:20:59,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:20:59,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 06:20:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:20:59,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-19 06:20:59,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:21:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 576 proven. 237 refuted. 0 times theorem prover too weak. 2971 trivial. 0 not checked. [2023-12-19 06:21:15,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 06:21:37,718 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (mod c_~last_1_var_1_17~0 4294967296)) (.cse3 (mod c_~last_1_var_1_7~0 4294967296)) (.cse2 (mod c_~var_1_9~0 4294967296))) (let ((.cse6 (< 2147483647 .cse2)) (.cse7 (< .cse3 .cse2)) (.cse9 (* 4294967296 (div .cse2 4294967296))) (.cse8 (< (mod (+ (* c_~var_1_9~0 4294967295) c_~last_1_var_1_17~0) 4294967296) .cse2)) (.cse11 (+ .cse2 .cse4)) (.cse5 (mod c_~var_1_11~0 256))) (and (or (forall ((v_z_171 Int)) (let ((.cse1 (+ v_z_171 .cse5))) (or (< 255 v_z_171) (let ((.cse0 (+ .cse3 .cse4))) (< (+ (* (div .cse0 4294967296) 4294967296) (mod (mod .cse1 .cse2) 4294967296)) .cse0)) (< v_z_171 0) (< .cse1 1) (< .cse3 v_z_171)))) (< (mod (+ c_~last_1_var_1_17~0 (* c_~last_1_var_1_7~0 4294967295)) 4294967296) .cse2) (< .cse2 (+ .cse3 1)) (< 2147483647 .cse3)) (or .cse6 .cse7 .cse8 (forall ((v_z_171 Int)) (let ((.cse10 (+ v_z_171 .cse5))) (or (< (+ .cse9 (mod (mod .cse10 .cse2) 4294967296)) .cse11) (< v_z_171 0) (< .cse10 1) (< .cse2 v_z_171))))) (or .cse6 .cse7 (forall ((v_z_171 Int)) (let ((.cse12 (+ v_z_171 .cse5))) (or (< (+ .cse9 4294967296 (mod (mod .cse12 .cse2) 4294967296)) .cse11) (< 255 v_z_171) (< v_z_171 0) (< .cse12 1) (< .cse2 v_z_171)))) .cse8 (< (* (div .cse11 4294967296) 4294967296) (+ .cse2 1))) (or (< (mod (mod .cse5 .cse2) 4294967296) .cse4) (< .cse4 .cse2) (< .cse5 1))))) is different from false [2023-12-19 06:21:48,069 WARN L293 SmtUtils]: Spent 7.20s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 06:22:03,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:22:03,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712000258] [2023-12-19 06:22:03,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:22:03,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284102440] [2023-12-19 06:22:03,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284102440] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 06:22:03,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 06:22:03,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-19 06:22:03,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427835267] [2023-12-19 06:22:03,352 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 06:22:03,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-19 06:22:03,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:22:03,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-19 06:22:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=688, Unknown=6, NotChecked=54, Total=870 [2023-12-19 06:22:03,353 INFO L87 Difference]: Start difference. First operand 1191 states and 1894 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 3 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-19 06:22:15,816 WARN L293 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 94 DAG size of output: 82 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 06:22:19,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 06:22:23,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 06:22:31,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 06:22:36,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 06:22:40,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 06:22:45,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 06:22:46,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 06:22:47,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:22:47,669 INFO L93 Difference]: Finished difference Result 3569 states and 5549 transitions. [2023-12-19 06:22:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-19 06:22:47,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 3 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 274 [2023-12-19 06:22:47,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:22:47,681 INFO L225 Difference]: With dead ends: 3569 [2023-12-19 06:22:47,682 INFO L226 Difference]: Without dead ends: 2386 [2023-12-19 06:22:47,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=638, Invalid=2552, Unknown=6, NotChecked=110, Total=3306 [2023-12-19 06:22:47,686 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 796 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 144 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time [2023-12-19 06:22:47,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 1572 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1674 Invalid, 6 Unknown, 0 Unchecked, 31.3s Time] [2023-12-19 06:22:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2023-12-19 06:22:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1836. [2023-12-19 06:22:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1467 states have (on average 1.4826175869120655) internal successors, (2175), 1472 states have internal predecessors, (2175), 344 states have call successors, (344), 24 states have call predecessors, (344), 24 states have return successors, (344), 339 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-19 06:22:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2863 transitions. [2023-12-19 06:22:47,819 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2863 transitions. Word has length 274 [2023-12-19 06:22:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:22:47,819 INFO L495 AbstractCegarLoop]: Abstraction has 1836 states and 2863 transitions. [2023-12-19 06:22:47,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 3 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-19 06:22:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2863 transitions. [2023-12-19 06:22:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:22:47,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:22:47,822 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:22:47,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 06:22:48,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-19 06:22:48,029 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:22:48,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:22:48,030 INFO L85 PathProgramCache]: Analyzing trace with hash -980456040, now seen corresponding path program 1 times [2023-12-19 06:22:48,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:22:48,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843131584] [2023-12-19 06:22:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:22:48,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:22:48,059 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:22:48,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624479576] [2023-12-19 06:22:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:22:48,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:22:48,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:22:48,060 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:22:48,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 06:22:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:22:48,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 06:22:48,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:22:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:22:59,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:22:59,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:22:59,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843131584] [2023-12-19 06:22:59,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:22:59,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624479576] [2023-12-19 06:22:59,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624479576] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:22:59,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:22:59,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:22:59,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247971269] [2023-12-19 06:22:59,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:22:59,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:22:59,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:22:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:22:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:22:59,890 INFO L87 Difference]: Start difference. First operand 1836 states and 2863 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:23:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:23:16,670 INFO L93 Difference]: Finished difference Result 2743 states and 4303 transitions. [2023-12-19 06:23:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 06:23:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 274 [2023-12-19 06:23:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:23:16,684 INFO L225 Difference]: With dead ends: 2743 [2023-12-19 06:23:16,684 INFO L226 Difference]: Without dead ends: 2036 [2023-12-19 06:23:16,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-12-19 06:23:16,688 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 598 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-12-19 06:23:16,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 1708 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2023-12-19 06:23:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2023-12-19 06:23:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1848. [2023-12-19 06:23:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1479 states have (on average 1.4827586206896552) internal successors, (2193), 1484 states have internal predecessors, (2193), 344 states have call successors, (344), 24 states have call predecessors, (344), 24 states have return successors, (344), 339 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-19 06:23:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 2881 transitions. [2023-12-19 06:23:16,805 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 2881 transitions. Word has length 274 [2023-12-19 06:23:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:23:16,806 INFO L495 AbstractCegarLoop]: Abstraction has 1848 states and 2881 transitions. [2023-12-19 06:23:16,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:23:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 2881 transitions. [2023-12-19 06:23:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:23:16,807 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:23:16,808 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:23:16,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 06:23:17,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:23:17,014 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:23:17,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:23:17,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1393228235, now seen corresponding path program 1 times [2023-12-19 06:23:17,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:23:17,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814508040] [2023-12-19 06:23:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:23:17,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:23:17,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:23:17,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859236186] [2023-12-19 06:23:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:23:17,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:23:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:23:17,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:23:17,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 06:23:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:23:17,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-19 06:23:17,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:23:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1128 proven. 225 refuted. 0 times theorem prover too weak. 2431 trivial. 0 not checked. [2023-12-19 06:23:28,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 06:23:49,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:23:49,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814508040] [2023-12-19 06:23:49,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:23:49,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859236186] [2023-12-19 06:23:49,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859236186] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 06:23:49,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 06:23:49,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-19 06:23:49,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970198514] [2023-12-19 06:23:49,569 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 06:23:49,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 06:23:49,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:23:49,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 06:23:49,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=336, Unknown=1, NotChecked=0, Total=420 [2023-12-19 06:23:49,570 INFO L87 Difference]: Start difference. First operand 1848 states and 2881 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-19 06:23:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:23:55,730 INFO L93 Difference]: Finished difference Result 2664 states and 4070 transitions. [2023-12-19 06:23:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 06:23:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 274 [2023-12-19 06:23:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:23:55,739 INFO L225 Difference]: With dead ends: 2664 [2023-12-19 06:23:55,739 INFO L226 Difference]: Without dead ends: 2120 [2023-12-19 06:23:55,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=285, Invalid=1046, Unknown=1, NotChecked=0, Total=1332 [2023-12-19 06:23:55,742 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 345 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-19 06:23:55,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1137 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-19 06:23:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2023-12-19 06:23:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1852. [2023-12-19 06:23:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1482 states have (on average 1.4790823211875843) internal successors, (2192), 1487 states have internal predecessors, (2192), 344 states have call successors, (344), 25 states have call predecessors, (344), 25 states have return successors, (344), 339 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-19 06:23:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2880 transitions. [2023-12-19 06:23:55,865 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2880 transitions. Word has length 274 [2023-12-19 06:23:55,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:23:55,865 INFO L495 AbstractCegarLoop]: Abstraction has 1852 states and 2880 transitions. [2023-12-19 06:23:55,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-19 06:23:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2880 transitions. [2023-12-19 06:23:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:23:55,867 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:23:55,867 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:23:55,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 06:23:56,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 06:23:56,074 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:23:56,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:23:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash -815173730, now seen corresponding path program 1 times [2023-12-19 06:23:56,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:23:56,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977393048] [2023-12-19 06:23:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:23:56,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:23:56,093 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:23:56,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122494093] [2023-12-19 06:23:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:23:56,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:23:56,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:23:56,102 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:23:56,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 06:23:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:23:56,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 06:23:56,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:23:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:23:58,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:23:58,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:23:58,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977393048] [2023-12-19 06:23:58,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:23:58,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122494093] [2023-12-19 06:23:58,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122494093] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:23:58,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:23:58,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 06:23:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529495939] [2023-12-19 06:23:58,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:23:58,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 06:23:58,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:23:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 06:23:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 06:23:58,099 INFO L87 Difference]: Start difference. First operand 1852 states and 2880 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:23:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:23:58,509 INFO L93 Difference]: Finished difference Result 3253 states and 5066 transitions. [2023-12-19 06:23:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 06:23:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 274 [2023-12-19 06:23:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:23:58,530 INFO L225 Difference]: With dead ends: 3253 [2023-12-19 06:23:58,530 INFO L226 Difference]: Without dead ends: 1814 [2023-12-19 06:23:58,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 06:23:58,534 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 138 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 06:23:58,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 595 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 06:23:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2023-12-19 06:23:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1744. [2023-12-19 06:23:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1374 states have (on average 1.4614264919941775) internal successors, (2008), 1379 states have internal predecessors, (2008), 344 states have call successors, (344), 25 states have call predecessors, (344), 25 states have return successors, (344), 339 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-19 06:23:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2696 transitions. [2023-12-19 06:23:58,666 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2696 transitions. Word has length 274 [2023-12-19 06:23:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:23:58,667 INFO L495 AbstractCegarLoop]: Abstraction has 1744 states and 2696 transitions. [2023-12-19 06:23:58,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:23:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2696 transitions. [2023-12-19 06:23:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:23:58,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:23:58,670 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:23:58,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 06:23:58,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-19 06:23:58,876 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:23:58,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:23:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1108754264, now seen corresponding path program 1 times [2023-12-19 06:23:58,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:23:58,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673990252] [2023-12-19 06:23:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:23:58,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:23:58,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:23:58,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846705997] [2023-12-19 06:23:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:23:58,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:23:58,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:23:58,914 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:23:58,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 06:23:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:23:59,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 06:23:59,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:24:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:24:08,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:24:08,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:24:08,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673990252] [2023-12-19 06:24:08,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:24:08,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846705997] [2023-12-19 06:24:08,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846705997] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:24:08,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:24:08,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:24:08,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418230709] [2023-12-19 06:24:08,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:24:08,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:24:08,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:24:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:24:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:24:08,828 INFO L87 Difference]: Start difference. First operand 1744 states and 2696 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:24:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:24:19,655 INFO L93 Difference]: Finished difference Result 3209 states and 5010 transitions. [2023-12-19 06:24:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 06:24:19,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 274 [2023-12-19 06:24:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:24:19,662 INFO L225 Difference]: With dead ends: 3209 [2023-12-19 06:24:19,662 INFO L226 Difference]: Without dead ends: 2022 [2023-12-19 06:24:19,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-12-19 06:24:19,665 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 321 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-12-19 06:24:19,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1266 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-12-19 06:24:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2023-12-19 06:24:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1756. [2023-12-19 06:24:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1386 states have (on average 1.4603174603174602) internal successors, (2024), 1391 states have internal predecessors, (2024), 344 states have call successors, (344), 25 states have call predecessors, (344), 25 states have return successors, (344), 339 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-19 06:24:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2712 transitions. [2023-12-19 06:24:19,791 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2712 transitions. Word has length 274 [2023-12-19 06:24:19,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:24:19,792 INFO L495 AbstractCegarLoop]: Abstraction has 1756 states and 2712 transitions. [2023-12-19 06:24:19,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:24:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2712 transitions. [2023-12-19 06:24:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:24:19,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:24:19,794 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:24:19,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 06:24:20,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 06:24:20,001 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:24:20,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:24:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash 299407638, now seen corresponding path program 1 times [2023-12-19 06:24:20,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:24:20,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611483607] [2023-12-19 06:24:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:24:20,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:24:20,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:24:20,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769754369] [2023-12-19 06:24:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:24:20,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:24:20,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:24:20,026 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:24:20,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 06:24:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:24:20,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 06:24:20,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:24:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:24:30,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:24:30,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:24:30,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611483607] [2023-12-19 06:24:30,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:24:30,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769754369] [2023-12-19 06:24:30,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769754369] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:24:30,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:24:30,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:24:30,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109169033] [2023-12-19 06:24:30,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:24:30,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:24:30,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:24:30,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:24:30,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:24:30,656 INFO L87 Difference]: Start difference. First operand 1756 states and 2712 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:24:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:24:44,946 INFO L93 Difference]: Finished difference Result 3249 states and 5066 transitions. [2023-12-19 06:24:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 06:24:44,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 274 [2023-12-19 06:24:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:24:44,952 INFO L225 Difference]: With dead ends: 3249 [2023-12-19 06:24:44,952 INFO L226 Difference]: Without dead ends: 2034 [2023-12-19 06:24:44,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-12-19 06:24:44,955 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 368 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-12-19 06:24:44,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1133 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2023-12-19 06:24:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2023-12-19 06:24:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1764. [2023-12-19 06:24:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1394 states have (on average 1.460545193687231) internal successors, (2036), 1399 states have internal predecessors, (2036), 344 states have call successors, (344), 25 states have call predecessors, (344), 25 states have return successors, (344), 339 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-19 06:24:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2724 transitions. [2023-12-19 06:24:45,071 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2724 transitions. Word has length 274 [2023-12-19 06:24:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:24:45,071 INFO L495 AbstractCegarLoop]: Abstraction has 1764 states and 2724 transitions. [2023-12-19 06:24:45,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:24:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2724 transitions. [2023-12-19 06:24:45,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-19 06:24:45,073 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:24:45,073 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:24:45,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 06:24:45,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 06:24:45,280 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:24:45,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:24:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash -778919018, now seen corresponding path program 1 times [2023-12-19 06:24:45,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:24:45,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375021812] [2023-12-19 06:24:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:24:45,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:24:45,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:24:45,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43075467] [2023-12-19 06:24:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:24:45,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:24:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:24:45,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:24:45,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 06:24:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:24:45,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-19 06:24:45,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:24:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 375 proven. 123 refuted. 0 times theorem prover too weak. 3286 trivial. 0 not checked. [2023-12-19 06:24:54,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 06:25:08,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:25:08,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375021812] [2023-12-19 06:25:08,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:25:08,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43075467] [2023-12-19 06:25:08,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43075467] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 06:25:08,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 06:25:08,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-19 06:25:08,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222931297] [2023-12-19 06:25:08,883 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 06:25:08,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:25:08,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:25:08,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:25:08,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-12-19 06:25:08,884 INFO L87 Difference]: Start difference. First operand 1764 states and 2724 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2023-12-19 06:25:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:25:14,286 INFO L93 Difference]: Finished difference Result 3287 states and 5032 transitions. [2023-12-19 06:25:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 06:25:14,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 274 [2023-12-19 06:25:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:25:14,293 INFO L225 Difference]: With dead ends: 3287 [2023-12-19 06:25:14,293 INFO L226 Difference]: Without dead ends: 1974 [2023-12-19 06:25:14,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2023-12-19 06:25:14,297 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 317 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-19 06:25:14,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1158 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-19 06:25:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2023-12-19 06:25:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1700. [2023-12-19 06:25:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1330 states have (on average 1.457142857142857) internal successors, (1938), 1335 states have internal predecessors, (1938), 344 states have call successors, (344), 25 states have call predecessors, (344), 25 states have return successors, (344), 339 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-19 06:25:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2626 transitions. [2023-12-19 06:25:14,428 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2626 transitions. Word has length 274 [2023-12-19 06:25:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:25:14,428 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2626 transitions. [2023-12-19 06:25:14,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2023-12-19 06:25:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2626 transitions. [2023-12-19 06:25:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 06:25:14,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:25:14,430 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:25:14,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 06:25:14,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:25:14,638 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:25:14,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:25:14,638 INFO L85 PathProgramCache]: Analyzing trace with hash 99938649, now seen corresponding path program 1 times [2023-12-19 06:25:14,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:25:14,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181775345] [2023-12-19 06:25:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:14,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:25:14,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:25:14,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099982459] [2023-12-19 06:25:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:14,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:25:14,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:25:14,677 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:25:14,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 06:25:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:25:15,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 06:25:15,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:25:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:25:17,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:25:17,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:25:17,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181775345] [2023-12-19 06:25:17,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:25:17,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099982459] [2023-12-19 06:25:17,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099982459] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:25:17,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:25:17,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 06:25:17,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884268163] [2023-12-19 06:25:17,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:25:17,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 06:25:17,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:25:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 06:25:17,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-19 06:25:17,258 INFO L87 Difference]: Start difference. First operand 1700 states and 2626 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:25:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:25:20,513 INFO L93 Difference]: Finished difference Result 2426 states and 3759 transitions. [2023-12-19 06:25:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 06:25:20,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 275 [2023-12-19 06:25:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:25:20,522 INFO L225 Difference]: With dead ends: 2426 [2023-12-19 06:25:20,522 INFO L226 Difference]: Without dead ends: 2183 [2023-12-19 06:25:20,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-12-19 06:25:20,524 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 300 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-19 06:25:20,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1428 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-19 06:25:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2023-12-19 06:25:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 2007. [2023-12-19 06:25:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 1573 states have (on average 1.4621741894469167) internal successors, (2300), 1579 states have internal predecessors, (2300), 404 states have call successors, (404), 29 states have call predecessors, (404), 29 states have return successors, (404), 398 states have call predecessors, (404), 404 states have call successors, (404) [2023-12-19 06:25:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 3108 transitions. [2023-12-19 06:25:20,694 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 3108 transitions. Word has length 275 [2023-12-19 06:25:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:25:20,695 INFO L495 AbstractCegarLoop]: Abstraction has 2007 states and 3108 transitions. [2023-12-19 06:25:20,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:25:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 3108 transitions. [2023-12-19 06:25:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 06:25:20,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:25:20,697 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:25:20,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 06:25:20,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 06:25:20,917 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:25:20,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:25:20,917 INFO L85 PathProgramCache]: Analyzing trace with hash 157196951, now seen corresponding path program 1 times [2023-12-19 06:25:20,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:25:20,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900874835] [2023-12-19 06:25:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:20,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:25:20,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:25:20,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696185297] [2023-12-19 06:25:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:20,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:25:20,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:25:20,948 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:25:20,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 06:25:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:25:21,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 06:25:21,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:25:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:25:25,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:25:25,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:25:25,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900874835] [2023-12-19 06:25:25,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:25:25,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696185297] [2023-12-19 06:25:25,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696185297] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:25:25,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:25:25,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:25:25,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481154418] [2023-12-19 06:25:25,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:25:25,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:25:25,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:25:25,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:25:25,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:25:25,890 INFO L87 Difference]: Start difference. First operand 2007 states and 3108 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:25:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:25:34,982 INFO L93 Difference]: Finished difference Result 3347 states and 5206 transitions. [2023-12-19 06:25:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-19 06:25:34,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 275 [2023-12-19 06:25:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:25:34,990 INFO L225 Difference]: With dead ends: 3347 [2023-12-19 06:25:34,990 INFO L226 Difference]: Without dead ends: 2815 [2023-12-19 06:25:34,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2023-12-19 06:25:34,992 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 577 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-12-19 06:25:34,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 2155 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-12-19 06:25:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2023-12-19 06:25:35,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2519. [2023-12-19 06:25:35,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 1957 states have (on average 1.4624425140521207) internal successors, (2862), 1965 states have internal predecessors, (2862), 524 states have call successors, (524), 37 states have call predecessors, (524), 37 states have return successors, (524), 516 states have call predecessors, (524), 524 states have call successors, (524) [2023-12-19 06:25:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 3910 transitions. [2023-12-19 06:25:35,173 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 3910 transitions. Word has length 275 [2023-12-19 06:25:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:25:35,174 INFO L495 AbstractCegarLoop]: Abstraction has 2519 states and 3910 transitions. [2023-12-19 06:25:35,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:25:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 3910 transitions. [2023-12-19 06:25:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 06:25:35,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:25:35,176 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:25:35,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 06:25:35,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 06:25:35,385 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:25:35,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:25:35,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1121007003, now seen corresponding path program 1 times [2023-12-19 06:25:35,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:25:35,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101135778] [2023-12-19 06:25:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:35,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:25:35,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:25:35,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683900036] [2023-12-19 06:25:35,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:35,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:25:35,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:25:35,412 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:25:35,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 06:25:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:25:35,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 06:25:35,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:25:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1473 proven. 96 refuted. 0 times theorem prover too weak. 2215 trivial. 0 not checked. [2023-12-19 06:25:37,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 06:25:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 33 proven. 96 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-12-19 06:25:38,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:25:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101135778] [2023-12-19 06:25:38,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:25:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683900036] [2023-12-19 06:25:38,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683900036] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 06:25:38,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 06:25:38,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-19 06:25:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455883274] [2023-12-19 06:25:38,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 06:25:38,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 06:25:38,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:25:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 06:25:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-19 06:25:38,125 INFO L87 Difference]: Start difference. First operand 2519 states and 3910 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 2 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-12-19 06:25:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:25:40,762 INFO L93 Difference]: Finished difference Result 3360 states and 5177 transitions. [2023-12-19 06:25:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 06:25:40,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 2 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) Word has length 275 [2023-12-19 06:25:40,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:25:40,769 INFO L225 Difference]: With dead ends: 3360 [2023-12-19 06:25:40,770 INFO L226 Difference]: Without dead ends: 1778 [2023-12-19 06:25:40,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 541 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-12-19 06:25:40,775 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 252 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-19 06:25:40,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 951 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-19 06:25:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2023-12-19 06:25:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1722. [2023-12-19 06:25:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1341 states have (on average 1.4399701715137956) internal successors, (1931), 1346 states have internal predecessors, (1931), 344 states have call successors, (344), 36 states have call predecessors, (344), 36 states have return successors, (344), 339 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-19 06:25:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2619 transitions. [2023-12-19 06:25:40,892 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2619 transitions. Word has length 275 [2023-12-19 06:25:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:25:40,892 INFO L495 AbstractCegarLoop]: Abstraction has 1722 states and 2619 transitions. [2023-12-19 06:25:40,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 2 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-12-19 06:25:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2619 transitions. [2023-12-19 06:25:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 06:25:40,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:25:40,894 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:25:40,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 06:25:41,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 06:25:41,101 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:25:41,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:25:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash -467340899, now seen corresponding path program 1 times [2023-12-19 06:25:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:25:41,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565104214] [2023-12-19 06:25:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:41,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:25:41,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:25:41,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031169521] [2023-12-19 06:25:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:41,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:25:41,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:25:41,118 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:25:41,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 06:25:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:25:41,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 06:25:41,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:25:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:25:43,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:25:43,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:25:43,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565104214] [2023-12-19 06:25:43,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:25:43,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031169521] [2023-12-19 06:25:43,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031169521] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:25:43,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:25:43,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-19 06:25:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069908805] [2023-12-19 06:25:43,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:25:43,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 06:25:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:25:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 06:25:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-19 06:25:43,571 INFO L87 Difference]: Start difference. First operand 1722 states and 2619 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:25:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:25:45,694 INFO L93 Difference]: Finished difference Result 2398 states and 3660 transitions. [2023-12-19 06:25:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 06:25:45,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 275 [2023-12-19 06:25:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:25:45,698 INFO L225 Difference]: With dead ends: 2398 [2023-12-19 06:25:45,698 INFO L226 Difference]: Without dead ends: 1894 [2023-12-19 06:25:45,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-12-19 06:25:45,700 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 177 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 06:25:45,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 883 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 06:25:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2023-12-19 06:25:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1718. [2023-12-19 06:25:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1337 states have (on average 1.4397905759162304) internal successors, (1925), 1342 states have internal predecessors, (1925), 344 states have call successors, (344), 36 states have call predecessors, (344), 36 states have return successors, (344), 339 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-19 06:25:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2613 transitions. [2023-12-19 06:25:45,809 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2613 transitions. Word has length 275 [2023-12-19 06:25:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:25:45,809 INFO L495 AbstractCegarLoop]: Abstraction has 1718 states and 2613 transitions. [2023-12-19 06:25:45,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:25:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2613 transitions. [2023-12-19 06:25:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 06:25:45,811 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:25:45,811 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:25:45,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 06:25:46,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 06:25:46,020 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:25:46,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:25:46,021 INFO L85 PathProgramCache]: Analyzing trace with hash -410082597, now seen corresponding path program 1 times [2023-12-19 06:25:46,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:25:46,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354900467] [2023-12-19 06:25:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:46,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:25:46,043 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:25:46,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900409654] [2023-12-19 06:25:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:46,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:25:46,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:25:46,048 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:25:46,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 06:25:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:25:46,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 06:25:46,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:25:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:25:50,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:25:50,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:25:50,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354900467] [2023-12-19 06:25:50,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:25:50,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900409654] [2023-12-19 06:25:50,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900409654] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:25:50,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:25:50,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:25:50,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578459880] [2023-12-19 06:25:50,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:25:50,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:25:50,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:25:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:25:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:25:50,661 INFO L87 Difference]: Start difference. First operand 1718 states and 2613 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:25:56,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:25:56,487 INFO L93 Difference]: Finished difference Result 3110 states and 4747 transitions. [2023-12-19 06:25:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-19 06:25:56,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 275 [2023-12-19 06:25:56,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:25:56,492 INFO L225 Difference]: With dead ends: 3110 [2023-12-19 06:25:56,492 INFO L226 Difference]: Without dead ends: 2558 [2023-12-19 06:25:56,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2023-12-19 06:25:56,495 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 534 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-19 06:25:56,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1327 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-19 06:25:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2023-12-19 06:25:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2013. [2023-12-19 06:25:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 1566 states have (on average 1.4374201787994891) internal successors, (2251), 1572 states have internal predecessors, (2251), 404 states have call successors, (404), 42 states have call predecessors, (404), 42 states have return successors, (404), 398 states have call predecessors, (404), 404 states have call successors, (404) [2023-12-19 06:25:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 3059 transitions. [2023-12-19 06:25:56,642 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 3059 transitions. Word has length 275 [2023-12-19 06:25:56,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:25:56,643 INFO L495 AbstractCegarLoop]: Abstraction has 2013 states and 3059 transitions. [2023-12-19 06:25:56,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:25:56,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 3059 transitions. [2023-12-19 06:25:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-12-19 06:25:56,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:25:56,645 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:25:56,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-19 06:25:56,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:25:56,855 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:25:56,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:25:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1477588407, now seen corresponding path program 1 times [2023-12-19 06:25:56,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:25:56,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244637440] [2023-12-19 06:25:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:56,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:25:56,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:25:56,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470341191] [2023-12-19 06:25:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:25:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:25:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:25:56,871 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:25:56,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 06:25:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:25:57,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-19 06:25:57,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:26:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:26:03,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:26:03,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:26:03,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244637440] [2023-12-19 06:26:03,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:26:03,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470341191] [2023-12-19 06:26:03,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470341191] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:26:03,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:26:03,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-19 06:26:03,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939234340] [2023-12-19 06:26:03,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:26:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 06:26:03,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:26:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 06:26:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-19 06:26:03,809 INFO L87 Difference]: Start difference. First operand 2013 states and 3059 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:26:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:26:07,744 INFO L93 Difference]: Finished difference Result 3809 states and 5792 transitions. [2023-12-19 06:26:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 06:26:07,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 275 [2023-12-19 06:26:07,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:26:07,756 INFO L225 Difference]: With dead ends: 3809 [2023-12-19 06:26:07,756 INFO L226 Difference]: Without dead ends: 2217 [2023-12-19 06:26:07,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-12-19 06:26:07,759 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 225 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-19 06:26:07,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1087 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-19 06:26:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2023-12-19 06:26:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2053. [2023-12-19 06:26:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 1606 states have (on average 1.4265255292652552) internal successors, (2291), 1612 states have internal predecessors, (2291), 404 states have call successors, (404), 42 states have call predecessors, (404), 42 states have return successors, (404), 398 states have call predecessors, (404), 404 states have call successors, (404) [2023-12-19 06:26:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 3099 transitions. [2023-12-19 06:26:07,907 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 3099 transitions. Word has length 275 [2023-12-19 06:26:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:26:07,907 INFO L495 AbstractCegarLoop]: Abstraction has 2053 states and 3099 transitions. [2023-12-19 06:26:07,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:26:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 3099 transitions. [2023-12-19 06:26:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-19 06:26:07,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:26:07,909 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:26:07,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 06:26:08,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:26:08,110 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:26:08,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:26:08,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1692464465, now seen corresponding path program 1 times [2023-12-19 06:26:08,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:26:08,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436073787] [2023-12-19 06:26:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:26:08,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:26:08,125 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:26:08,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265913685] [2023-12-19 06:26:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:26:08,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:26:08,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:26:08,140 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:26:08,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 06:26:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:26:08,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-19 06:26:08,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:26:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1285 proven. 102 refuted. 0 times theorem prover too weak. 2397 trivial. 0 not checked. [2023-12-19 06:26:12,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 06:26:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 27 proven. 102 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-12-19 06:26:13,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:26:13,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436073787] [2023-12-19 06:26:13,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:26:13,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265913685] [2023-12-19 06:26:13,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265913685] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 06:26:13,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 06:26:13,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-12-19 06:26:13,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658710335] [2023-12-19 06:26:13,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 06:26:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 06:26:13,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:26:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 06:26:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-12-19 06:26:13,632 INFO L87 Difference]: Start difference. First operand 2053 states and 3099 transitions. Second operand has 18 states, 18 states have (on average 6.611111111111111) internal successors, (119), 18 states have internal predecessors, (119), 4 states have call successors, (88), 3 states have call predecessors, (88), 5 states have return successors, (88), 4 states have call predecessors, (88), 4 states have call successors, (88) [2023-12-19 06:26:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:26:26,311 INFO L93 Difference]: Finished difference Result 6611 states and 9815 transitions. [2023-12-19 06:26:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-19 06:26:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.611111111111111) internal successors, (119), 18 states have internal predecessors, (119), 4 states have call successors, (88), 3 states have call predecessors, (88), 5 states have return successors, (88), 4 states have call predecessors, (88), 4 states have call successors, (88) Word has length 276 [2023-12-19 06:26:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:26:26,322 INFO L225 Difference]: With dead ends: 6611 [2023-12-19 06:26:26,322 INFO L226 Difference]: Without dead ends: 5461 [2023-12-19 06:26:26,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=904, Invalid=3386, Unknown=0, NotChecked=0, Total=4290 [2023-12-19 06:26:26,325 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 2553 mSDsluCounter, 2356 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 1411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2589 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1411 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-12-19 06:26:26,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2589 Valid, 2659 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1411 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-12-19 06:26:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2023-12-19 06:26:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3223. [2023-12-19 06:26:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2443 states have (on average 1.3966434711420386) internal successors, (3412), 2459 states have internal predecessors, (3412), 680 states have call successors, (680), 99 states have call predecessors, (680), 99 states have return successors, (680), 664 states have call predecessors, (680), 680 states have call successors, (680) [2023-12-19 06:26:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4772 transitions. [2023-12-19 06:26:26,632 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4772 transitions. Word has length 276 [2023-12-19 06:26:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:26:26,632 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 4772 transitions. [2023-12-19 06:26:26,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.611111111111111) internal successors, (119), 18 states have internal predecessors, (119), 4 states have call successors, (88), 3 states have call predecessors, (88), 5 states have return successors, (88), 4 states have call predecessors, (88), 4 states have call successors, (88) [2023-12-19 06:26:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4772 transitions. [2023-12-19 06:26:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-19 06:26:26,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:26:26,634 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:26:26,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 06:26:26,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:26:26,841 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:26:26,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:26:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1006387090, now seen corresponding path program 1 times [2023-12-19 06:26:26,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:26:26,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3832757] [2023-12-19 06:26:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:26:26,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:26:26,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:26:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884505986] [2023-12-19 06:26:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:26:26,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:26:26,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:26:26,867 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:26:26,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 06:26:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:26:27,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 06:26:27,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:26:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:26:36,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:26:36,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:26:36,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3832757] [2023-12-19 06:26:36,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:26:36,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884505986] [2023-12-19 06:26:36,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884505986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:26:36,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:26:36,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:26:36,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186526812] [2023-12-19 06:26:36,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:26:36,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:26:36,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:26:36,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:26:36,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:26:36,301 INFO L87 Difference]: Start difference. First operand 3223 states and 4772 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:26:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:26:50,742 INFO L93 Difference]: Finished difference Result 4866 states and 7211 transitions. [2023-12-19 06:26:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-19 06:26:50,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 276 [2023-12-19 06:26:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:26:50,752 INFO L225 Difference]: With dead ends: 4866 [2023-12-19 06:26:50,752 INFO L226 Difference]: Without dead ends: 3799 [2023-12-19 06:26:50,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 06:26:50,755 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 644 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-12-19 06:26:50,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 1718 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-12-19 06:26:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2023-12-19 06:26:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3237. [2023-12-19 06:26:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 2457 states have (on average 1.3976393976393977) internal successors, (3434), 2473 states have internal predecessors, (3434), 680 states have call successors, (680), 99 states have call predecessors, (680), 99 states have return successors, (680), 664 states have call predecessors, (680), 680 states have call successors, (680) [2023-12-19 06:26:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4794 transitions. [2023-12-19 06:26:51,052 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4794 transitions. Word has length 276 [2023-12-19 06:26:51,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:26:51,052 INFO L495 AbstractCegarLoop]: Abstraction has 3237 states and 4794 transitions. [2023-12-19 06:26:51,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:26:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4794 transitions. [2023-12-19 06:26:51,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-19 06:26:51,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:26:51,054 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:26:51,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 06:26:51,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:26:51,264 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:26:51,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:26:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1815733716, now seen corresponding path program 1 times [2023-12-19 06:26:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:26:51,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549440615] [2023-12-19 06:26:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:26:51,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:26:51,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:26:51,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386074230] [2023-12-19 06:26:51,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:26:51,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:26:51,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:26:51,283 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:26:51,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 06:26:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:26:51,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 06:26:51,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:27:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:27:00,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:27:00,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:27:00,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549440615] [2023-12-19 06:27:00,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:27:00,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386074230] [2023-12-19 06:27:00,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386074230] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:27:00,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:27:00,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:27:00,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056128976] [2023-12-19 06:27:00,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:27:00,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:27:00,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:27:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:27:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:27:00,525 INFO L87 Difference]: Start difference. First operand 3237 states and 4794 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:27:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:27:16,380 INFO L93 Difference]: Finished difference Result 4830 states and 7159 transitions. [2023-12-19 06:27:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-19 06:27:16,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 276 [2023-12-19 06:27:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:27:16,387 INFO L225 Difference]: With dead ends: 4830 [2023-12-19 06:27:16,387 INFO L226 Difference]: Without dead ends: 3763 [2023-12-19 06:27:16,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 06:27:16,389 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 662 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-12-19 06:27:16,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1922 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-12-19 06:27:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2023-12-19 06:27:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3241. [2023-12-19 06:27:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3241 states, 2461 states have (on average 1.3969930922389273) internal successors, (3438), 2477 states have internal predecessors, (3438), 680 states have call successors, (680), 99 states have call predecessors, (680), 99 states have return successors, (680), 664 states have call predecessors, (680), 680 states have call successors, (680) [2023-12-19 06:27:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 4798 transitions. [2023-12-19 06:27:16,667 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 4798 transitions. Word has length 276 [2023-12-19 06:27:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:27:16,667 INFO L495 AbstractCegarLoop]: Abstraction has 3241 states and 4798 transitions. [2023-12-19 06:27:16,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:27:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 4798 transitions. [2023-12-19 06:27:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-19 06:27:16,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:27:16,669 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:27:16,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-19 06:27:16,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:27:16,877 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:27:16,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:27:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1573666638, now seen corresponding path program 1 times [2023-12-19 06:27:16,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:27:16,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305387078] [2023-12-19 06:27:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:27:16,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:27:16,893 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:27:16,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020365136] [2023-12-19 06:27:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:27:16,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:27:16,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:27:16,895 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:27:16,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 06:27:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:27:17,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 06:27:17,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:27:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:27:25,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:27:25,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:27:25,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305387078] [2023-12-19 06:27:25,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:27:25,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020365136] [2023-12-19 06:27:25,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020365136] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:27:25,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:27:25,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:27:25,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743631073] [2023-12-19 06:27:25,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:27:25,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:27:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:27:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:27:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:27:25,662 INFO L87 Difference]: Start difference. First operand 3241 states and 4798 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:27:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:27:39,836 INFO L93 Difference]: Finished difference Result 5638 states and 8369 transitions. [2023-12-19 06:27:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-19 06:27:39,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 276 [2023-12-19 06:27:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:27:39,844 INFO L225 Difference]: With dead ends: 5638 [2023-12-19 06:27:39,845 INFO L226 Difference]: Without dead ends: 3799 [2023-12-19 06:27:39,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 06:27:39,849 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 557 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-12-19 06:27:39,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1597 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-12-19 06:27:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2023-12-19 06:27:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3255. [2023-12-19 06:27:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2475 states have (on average 1.3979797979797979) internal successors, (3460), 2491 states have internal predecessors, (3460), 680 states have call successors, (680), 99 states have call predecessors, (680), 99 states have return successors, (680), 664 states have call predecessors, (680), 680 states have call successors, (680) [2023-12-19 06:27:40,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4820 transitions. [2023-12-19 06:27:40,152 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4820 transitions. Word has length 276 [2023-12-19 06:27:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:27:40,152 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 4820 transitions. [2023-12-19 06:27:40,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:27:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4820 transitions. [2023-12-19 06:27:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-12-19 06:27:40,154 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:27:40,154 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:27:40,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-19 06:27:40,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:27:40,365 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:27:40,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:27:40,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1911954032, now seen corresponding path program 1 times [2023-12-19 06:27:40,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:27:40,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296269427] [2023-12-19 06:27:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:27:40,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:27:40,382 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:27:40,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133575794] [2023-12-19 06:27:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:27:40,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:27:40,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:27:40,384 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:27:40,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 06:27:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:27:40,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 06:27:40,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:27:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-12-19 06:27:50,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 06:27:50,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 06:27:50,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296269427] [2023-12-19 06:27:50,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 06:27:50,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133575794] [2023-12-19 06:27:50,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133575794] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 06:27:50,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 06:27:50,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-19 06:27:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841688864] [2023-12-19 06:27:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 06:27:50,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 06:27:50,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 06:27:50,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 06:27:50,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-19 06:27:50,146 INFO L87 Difference]: Start difference. First operand 3255 states and 4820 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:28:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 06:28:05,418 INFO L93 Difference]: Finished difference Result 5602 states and 8317 transitions. [2023-12-19 06:28:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-19 06:28:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 276 [2023-12-19 06:28:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 06:28:05,425 INFO L225 Difference]: With dead ends: 5602 [2023-12-19 06:28:05,426 INFO L226 Difference]: Without dead ends: 3763 [2023-12-19 06:28:05,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-12-19 06:28:05,430 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 548 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-19 06:28:05,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1465 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-19 06:28:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2023-12-19 06:28:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3259. [2023-12-19 06:28:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 2479 states have (on average 1.3973376361436063) internal successors, (3464), 2495 states have internal predecessors, (3464), 680 states have call successors, (680), 99 states have call predecessors, (680), 99 states have return successors, (680), 664 states have call predecessors, (680), 680 states have call successors, (680) [2023-12-19 06:28:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 4824 transitions. [2023-12-19 06:28:05,716 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 4824 transitions. Word has length 276 [2023-12-19 06:28:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 06:28:05,716 INFO L495 AbstractCegarLoop]: Abstraction has 3259 states and 4824 transitions. [2023-12-19 06:28:05,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-12-19 06:28:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 4824 transitions. [2023-12-19 06:28:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-12-19 06:28:05,718 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 06:28:05,718 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:28:05,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-19 06:28:05,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-19 06:28:05,925 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 06:28:05,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 06:28:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1596457214, now seen corresponding path program 1 times [2023-12-19 06:28:05,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 06:28:05,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635040174] [2023-12-19 06:28:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:28:05,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 06:28:05,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 06:28:05,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416040979] [2023-12-19 06:28:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 06:28:05,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 06:28:05,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 06:28:05,953 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 06:28:05,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-19 06:28:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 06:28:06,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-19 06:28:06,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 06:28:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-12-19 06:28:54,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-19 06:34:13,649 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 06:34:13,656 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 06:34:13,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-19 06:34:13,664 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 06:34:13,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-19 06:34:13,860 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 278 with TraceHistMax 44,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-29-2-2-2-2-2-2-2-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 context. [2023-12-19 06:34:13,864 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 06:34:13,865 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 06:34:13,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 06:34:13 BoogieIcfgContainer [2023-12-19 06:34:13,866 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 06:34:13,867 INFO L158 Benchmark]: Toolchain (without parser) took 858211.37ms. Allocated memory was 207.6MB in the beginning and 901.8MB in the end (delta: 694.2MB). Free memory was 153.6MB in the beginning and 349.5MB in the end (delta: -195.8MB). Peak memory consumption was 551.9MB. Max. memory is 8.0GB. [2023-12-19 06:34:13,867 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 167.8MB. Free memory was 114.6MB in the beginning and 114.5MB in the end (delta: 85.6kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 06:34:13,867 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.92ms. Allocated memory is still 207.6MB. Free memory was 153.6MB in the beginning and 135.1MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-12-19 06:34:13,867 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.39ms. Allocated memory is still 207.6MB. Free memory was 135.1MB in the beginning and 129.4MB in the end (delta: 5.8MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2023-12-19 06:34:13,868 INFO L158 Benchmark]: Boogie Preprocessor took 57.04ms. Allocated memory is still 207.6MB. Free memory was 129.4MB in the beginning and 122.0MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2023-12-19 06:34:13,868 INFO L158 Benchmark]: RCFGBuilder took 764.34ms. Allocated memory is still 207.6MB. Free memory was 122.0MB in the beginning and 151.6MB in the end (delta: -29.6MB). Peak memory consumption was 29.1MB. Max. memory is 8.0GB. [2023-12-19 06:34:13,868 INFO L158 Benchmark]: TraceAbstraction took 856990.45ms. Allocated memory was 207.6MB in the beginning and 901.8MB in the end (delta: 694.2MB). Free memory was 151.1MB in the beginning and 349.5MB in the end (delta: -198.3MB). Peak memory consumption was 547.9MB. Max. memory is 8.0GB. [2023-12-19 06:34:13,869 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 167.8MB. Free memory was 114.6MB in the beginning and 114.5MB in the end (delta: 85.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 325.92ms. Allocated memory is still 207.6MB. Free memory was 153.6MB in the beginning and 135.1MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 68.39ms. Allocated memory is still 207.6MB. Free memory was 135.1MB in the beginning and 129.4MB in the end (delta: 5.8MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 57.04ms. Allocated memory is still 207.6MB. Free memory was 129.4MB in the beginning and 122.0MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * RCFGBuilder took 764.34ms. Allocated memory is still 207.6MB. Free memory was 122.0MB in the beginning and 151.6MB in the end (delta: -29.6MB). Peak memory consumption was 29.1MB. Max. memory is 8.0GB. * TraceAbstraction took 856990.45ms. Allocated memory was 207.6MB in the beginning and 901.8MB in the end (delta: 694.2MB). Free memory was 151.1MB in the beginning and 349.5MB in the end (delta: -198.3MB). Peak memory consumption was 547.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was analyzing trace of length 278 with TraceHistMax 44,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-29-2-2-2-2-2-2-2-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 127 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 856.9s, OverallIterations: 26, TraceHistogramMax: 44, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 238.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 mSolverCounterUnknown, 11867 SdHoareTripleChecker+Valid, 146.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11819 mSDsluCounter, 31550 SdHoareTripleChecker+Invalid, 139.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 25162 mSDsCounter, 3197 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17715 IncrementalHoareTripleChecker+Invalid, 20921 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3197 mSolverCounterUnsat, 6388 mSDtfsCounter, 17715 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8653 GetRequests, 8056 SyntacticMatches, 1 SemanticMatches, 596 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 167.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3259occurred in iteration=25, InterpolantAutomatonStates: 462, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.6s AutomataMinimizationTime, 25 MinimizatonAttempts, 8410 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 236.2s InterpolantComputationTime, 7133 NumberOfCodeBlocks, 7133 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 8204 ConstructedInterpolants, 13 QuantifiedInterpolants, 56597 SizeOfPredicates, 322 NumberOfNonLiveVariables, 15747 ConjunctsInSsa, 466 ConjunctsInUnsatCore, 30 InterpolantComputations, 20 PerfectInterpolantSequences, 112083/113520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown